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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
1545 | return $this->error; |
1546 |
|
1547 | set_current_user(0, $user_login); |
1548 | if ( !current_user_can('upload_files') ) { |
1549 | logIO('O', '(MW) User does not have upload_files capability'); |
1550 | $this->error = new IXR_Error(401, __('You are not allowed to upload files to this site.')); |
1551 | return $this->error; |
1552 | } |
1553 |
|
1554 | if ( $upload_err = apply_filters( "pre_upload_error", false ) ) |
1555 | return new IXR_Error(500, $upload_err); |
1556 |
|
1557 | if(!empty($data["overwrite"]) && ($data["overwrite"] == true)) { |
1558 | // Get postmeta info on the object. |
1559 | $old_file = $wpdb->get_row(" |
1560 | SELECT ID |
1561 | FROM {$wpdb->posts} |
1562 | WHERE post_title = '{$name}' |
1563 | AND post_type = 'attachment' |